MARKUS

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Input;

using System.Windows.Interactivity;

using System.Windows.Media;

using System.Windows.Media.Animation;

namespace KCOM.Common

{

    public class ExpandingMouseOver : Behavior<UIElement>

    {

        private Storyboard _storyboard;

        private DoubleAnimation _daScaleX, _daScaleY;

        private ScaleTransform _scScale;

        public static readonly DependencyProperty ScaleFactorProperty = DependencyProperty.Register("ScaleFactor", typeof(double), typeof(ExpandingMouseOver), new PropertyMetadata(1.5));

        public double ScaleFactor

        {

            get

            {

                return (double)GetValue(ScaleFactorProperty);

            }

            set

            {

                SetValue(ScaleFactorProperty, value);

            }

        }

        protected override void OnAttached()

        {

            base.OnAttached();

            AssociatedObject.MouseEnter += new MouseEventHandler(OnMouseEnter);

            AssociatedObject.MouseLeave += new MouseEventHandler(OnMouseLeave);

            AssociatedObject.MouseLeftButtonDown += new MouseButtonEventHandler(OnLeftButtonDown);

            _scScale = new ScaleTransform();

            AssociatedObject.RenderTransformOrigin = new Point(0.5, 0.5);

            if (AssociatedObject.RenderTransform == null)

            {

                AssociatedObject.RenderTransform = _scScale;

            }

            else

            {

                if (AssociatedObject.RenderTransform is TransformGroup)

                {

                    ((TransformGroup)AssociatedObject.RenderTransform).Children.Add(_scScale);

                }

                else

                {

                    TransformGroup group = new TransformGroup();

                    group.Children.Add(AssociatedObject.RenderTransform);

                    group.Children.Add(_scScale);

                    AssociatedObject.RenderTransform = group;

                }

            }

            _daScaleX = new DoubleAnimation();

            _daScaleY = new DoubleAnimation();

            _daScaleX.Duration = _daScaleY.Duration = new Duration(new TimeSpan(0, 0, 0, 0, 150));

            Storyboard.SetTarget(_daScaleX, _scScale);

            Storyboard.SetTarget(_daScaleY, _scScale);

            Storyboard.SetTargetProperty(_daScaleX, new PropertyPath("ScaleX"));

            Storyboard.SetTargetProperty(_daScaleY, new PropertyPath("ScaleY"));

            _storyboard = new Storyboard();

            _storyboard.Children.Add(_daScaleX);

            _storyboard.Children.Add(_daScaleY);

        }

        protected override void OnDetaching()

        {

            base.OnDetaching();

            AssociatedObject.MouseEnter -= new MouseEventHandler(OnMouseEnter);

            AssociatedObject.MouseLeave -= new MouseEventHandler(OnMouseLeave);

            AssociatedObject.MouseLeftButtonDown -= new MouseButtonEventHandler(OnLeftButtonDown);

        }

        void OnMouseEnter(object sender, MouseEventArgs e)

        {

            _daScaleX.To = _daScaleY.To = ScaleFactor;

            _storyboard.Begin();

        }

        void OnMouseLeave(object sender, MouseEventArgs e)

        {

            _daScaleX.To = _daScaleY.To = 1.0;

            _storyboard.Begin();

        }

        void OnLeftButtonDown(object sender, MouseButtonEventArgs e)

        {

            _daScaleX.To = _daScaleY.To = 1.0;

            _storyboard.Begin();

        }

    }

}